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RSS FeedsEnergies, Vol. 12, Pages 587: Interpretation of Four Unique Phenomena and the Mechanism in Unsteady Flow Separation Controls (Energies)

 
 

14 february 2019 12:00:02

 
Energies, Vol. 12, Pages 587: Interpretation of Four Unique Phenomena and the Mechanism in Unsteady Flow Separation Controls (Energies)
 


Unsteady flow separation controls are effective in suppressing flow separations. However, the unique phenomena in unsteady separation control, including frequency-dependent, threshold, location-dependent, and lock-on effects, are not fully understood. Furthermore, the mechanism of the effectiveness that lies in unsteady flow controls remains unclear. Thus, this study aims to interpret further the unique phenomena and mechanism in unsteady flow separation controls. First, numerical simulation and some experimental results of a separated curved diffuser using pulsed jet flow control are discussed to show the four unique phenomena. Second, the bases of unsteady flow control, flow instability, and free shear flow theories are introduced to elucidate the unique phenomena and mechanism in unsteady flow separation controls. Subsequently, with the support of these theories, the unique phenomena of unsteady flow control are interpreted, and the mechanisms hidden in the phenomena are revealed.


 
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